While we’re awake, we have sufficient muscle tone to keep our airways open and allow for normal breathing. For people with sleep apnoea, the tissues in your neck collapse during sleep, effectively cutting off your breathing for short periods of time. When this happens, your brain automatically wakes you up, usually with a loud snore or jolting snort, in order to get you to breathe again. A person with OSA often experiences several of these wakening episodes during the night, though they often don’t remember them, and consequently feels very sleepy (more than just ‘tired’) during the day.